All times are local unless otherwise stated.

Copahue (Chile-Argentina) | 16 January-22 January 2013 | New Activity / Unrest Cite this Report
Copahue Southern Andean Volcanic Arc	OVDAS-SERNAGEOMIN reported that the web camera near Copahue recorded white gas plumes rising 250-1,300 m above the crater during 15-18 January and drifting W and NW. Seismicity remained at low levels. The Alert Level was lowered from Orange to Yellow on 18 January. A seismic swarm of long-period earthquakes started at 1420 on 22 January. The earthquakes were initially deep but became shallower, and volcano-tectonic events were more frequently detected, until the next report posted at 2200. Web camera and satellite images did not show any changes. The Alert Level was raised to Orange. Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Ketoi (Russia) | 16 January-22 January 2013 | New Activity / Unrest Cite this Report
Ketoi Kuril Volcanic Arc	SVERT reported that gas-and-steam emissions from Ketoi's Pallas Peak were observed in satellite imagery during 16-17 January. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Kizimen (Russia) | 16 January-22 January 2013 | New Activity / Unrest Cite this Report
Kizimen Eastern Kamchatka Volcanic Arc	KVERT reported that during 11-18 January moderate seismic activity continued at Kizimen. Video data showed that lava continued to extrude from the summit onto the E flank. Summit incandescence, strong gas-and-steam activity, and occasional hot avalanches on the W and E flanks accompanied the process. Satellite images detected two new lava flows on the SE flank and a thermal anomaly over the volcano during 10-15 January. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Rabaul (Papua New Guinea) | 16 January-22 January 2013 | New Activity / Unrest Cite this Report
Rabaul Bismarck Volcanic Arc	RVO reported that roaring and rumbling noises from Rabaul caldera's Tavurvur cone began at 2128 on 19 January and lasted for about 15 minutes. Darkness prevented visual observations but the next day ash emissions were evident. On 20 January small discrete explosions generated ash clouds that rose up to 500 m above the crater and drifted E and SE. A few days before the eruption an observer noticed that vegetation on the N flanks of South Daughter (Turangunan, ~2 km to the E) had browned, and on 18 January a climber reported a strong sulfur dioxide odor. A loud explosion at 2325 on 20 January was followed by a few minutes of continuous roaring and rumbling. During 20-22 January light gray ash emissions occurred at irregular intervals; the color of the plumes suggested mostly water vapor with low ash content. Plumes rose 200 m and drifted ESE on 20 January, and SW, S, and SSE on 21 January. Activity increased during 21-22 January with more frequent ash emissions occurring for extended periods. According to a news article, flights to Tokua airport were cancelled on 21 January. Emissions subsided in the afternoon of 22 January but small-to-moderate explosions continued. A large explosion at 2147 ejected incandescent fragments, and produced an ash plume that rose 2 km and drifted SE and ESE. Explosions were heard through the night. Ash plumes that rose from the crater on 23 January drifted SE. Sources: Rabaul Volcano Observatory (RVO), adelaidenow
Reventador (Ecuador) | 16 January-22 January 2013 | New Activity / Unrest Cite this Report
Reventador Northern Andean Volcanic Arc	IG reported that during 16-21 January seismicity at Reventador was moderate; cloud cover prevented visual observations. Incandescence in the crater was observed at night during 21-22 January. Starting at 0900 on 22 January seismicity at Reventador increased and was characterized by constant low-frequency, high-energy tremor detected by seismic stations around the volcano. Observers reported lava fountains in the crater and lava flows on the flanks, both of which became more intense at 1800. Explosions produced white-to-light-gray plumes that rose 2 km and drifted W. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Whakaari/White Island (New Zealand) | 16 January-22 January 2013 | New Activity / Unrest Cite this Report
Whakaari/White Island Taupo Volcanic Zone	On 22 January GeoNet Data Centre reported that unrest at White Island continued. A volcanologist visiting the area on 21 January observed that hydrothermal activity in the small "hot lake" had increased. The lake surface "domed up" from rising steam and gas, that also brought large amounts of sediment to the surface, often with a vivid white steam-and-gas "flashing" from around the base. Stronger events periodically occurred. The report noted that the activity had been increasing since late 2012 and was now semi-continuous. The Aviation Colour Code remained at Yellow (second lowest on a four-color scale) and the Volcanic Alert Level remained at 1. Source: GeoNet

Aira (Japan) | 16 January-22 January 2013 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	JMA reported that during 15-18 January explosions from Sakura-jima's Showa Crater ejected tephra as far as 1.3 km from the crater. A very small eruption occurred at Minami-dake Crater on 15 January. Based on information from JMA, the Tokyo VAAC reported that explosions during 16-21 January often generated plumes that rose to altitudes of 1.8-3 km (6,000-10,000 ft) a.s.l. and drifted NE, E, SE, and S. A pilot reported that an ash plume drifted SE at an altitude of 2.4 km (8,000 ft) a.s.l. on 19 January. Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Japan Meteorological Agency (JMA)
Karymsky (Russia) | 16 January-22 January 2013 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that moderate seismic activity at Karymsky was detected during 11-18 January, indicating that possible ash plumes rose to an altitude of 2.5 km (8,200 ft) a.s.l. Satellite imagery showed a thermal anomaly on the volcano on 11 and 14 January; cloud cover prevented observations on the other days. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea (United States) | 16 January-22 January 2013 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	During 16-22 January HVO reported that the circulating lava lake periodically rose and fell in the deep pit within Kilauea's Halema'uma'u Crater. The gas plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas. During 15-16 January rocks fell into and disrupted the lake surface. The lake level was 35 m below the Halema'uma'u crater floor on 16 January and 27 m below the floor on 19 January. At Pu'u 'O'o Crater, glow emanated from spatter cones on the SE part of the crater floor, from a spatter cone at the NW edge of the floor, and from a circulating lava lake on the NE part of the floor. Lava flows were active in a 1-km-wide area that stretched from near the base of the pali to the coast. Web cameras recorded steam plumes from lava sporadically entering the ocean at multiple locations. Lava levels remained mostly high in the crater; several lava flows from multiple vents were active on the crater floor. The lava lake was perched several meters above the crater rim and sporadically issued lava that flowed outside the crater and onto the E flank of the cone. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Lokon-Empung (Indonesia) | 16 January-22 January 2013 | Continuing ActivityCite this Report
Lokon-Empung Sangihe Volcanic Arc	Based on reports from CVGHM and ASHTAMs (a special NOTAM for volcanic ash), the Darwin VAAC reported that ash plumes rose from Lokon-Empung rose to altitudes of 3.7-4.5 km (12,000-14,800 ft) a.s.l. during 15-16 January. Ash was not detected in satellite imagery. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Nevado del Ruiz (Colombia) | 16 January-22 January 2013 | Continuing ActivityCite this Report
Nevado del Ruiz Northern Andean Volcanic Arc	Based on analysis of satellite imagery, the Washington VAAC reported that on 16 January a diffuse plume from Nevado del Ruiz possibly contained ash and drifted almost 55 km NE. A thermal anomaly was also detected. INGEOMINAS reported significant emissions of mostly gas and steam during 14-20 January; plumes rose 1.6 km above the crater and drifted E and SE, and then W during the later part of the week. Sources: Washington Volcanic Ash Advisory Center (VAAC), Servicio Geológico Colombiano (SGC)
Sheveluch (Russia) | 16 January-22 January 2013 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	Based on visual observations and analyses of satellite data, KVERT reported that during 11-18 January a viscous lava flow effused on the E flank of Shiveluch's lava dome, accompanied by hot avalanches, incandescence, and fumarolic activity. Satellite imagery showed a daily thermal anomaly on the lava dome. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Tolbachik (Russia) | 16 January-22 January 2013 | Continuing ActivityCite this Report
Tolbachik Eastern Kamchatka Volcanic Arc	KVERT reported that the S fissure along the W side of Tolbachinsky Dol, a lava plateau on the SW side of Tolbachik, continued to produce very fluid lava flows during 11-18 January that traveled to the W and S sides of Tolbachinsky Dol. Gas-and-ash plumes rose to an altitude of 4 km (13,100 ft) a.s.l. and drifted in multiple directions. A very large thermal anomaly on the N part of Tolbachinsky Dol was visible daily in satellite imagery. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,627 individual reports over 1,243 weeks (average of 17 per week) on 338 different volcanoes.

Use the dropdowns to choose the year and week for archived Weekly Reports.

 News Feeds and Google Placemarks

 Criteria & Disclaimers

The Weekly Volcanic Activity Report does not necessarily include all volcanic activity that occurred on Earth during the week. More than a dozen volcanoes globally have displayed more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. The Weekly Volcanic Activity Report summarizes volcanic activity that meets one or more of the following criteria:

- A volcano observatory raises or lowers the alert level at the volcano.
- A volcanic ash advisory has been released by a volcanic ash advisory center (VAAC) stating that an ash cloud has been produced from the volcano.
- A verifiable news report of new activity or a change in activity at the volcano has been issued.
- Observers have reported a significant change in volcanic activity. Such activity can include, but is not restricted to, pyroclastic flows, lahars, lava flows, dome collapse, or increased unrest.

Volcanoes are included in the "New Activity/Unrest" section of the Weekly Volcanic Activity Report if the activity occurs after at least 3 months of quiescence. Once a volcano is included in the "New Activity/Unrest" section, updates will remain in that section unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Continuing Activity" section. Volcanoes are also included in the "New Activity/Unrest" section if the volcano is undergoing a period of relatively high unrest, or increasing unrest. This is commonly equal to Alert Level Orange on a scale of Green, Yellow, Orange, Red, where Red is the highest alert. Or alert level 3 on a scale of 1-4 or 1-5.

It is important to note that volcanic activity meeting one or more of these criteria may occur during the week, but may not be included in the Weekly Volcanic Activity Report because we did not receive a report.

1. The Weekly Volcanic Activity Report is intended to provide timely information about global volcanism on a weekly basis. Consequently, the report is generated rapidly by summarizing volcanic reports from various sources, with little time for fact checking. The accuracy of the Weekly Volcanic Activity Report is dependent upon the quality of the volcanic activity reports we receive. Reports published in the Bulletin of the Global Volcanism Network are cover longer time periods and are more carefully reviewed, although all of the volcanoes discussed in the Weekly Volcanic Activity Report are not necessarily reported in the Bulletin. Because of our emphasis on rapid reporting on the web we have avoided diacritical marks. Reports are updated on the Weekly Volcanic Activity Report web page as they are received, therefore information may be included regarding events that occurred before the current report period.

2. Rapidly developing events lead to coverage that is often fragmentary. Volcanoes, their eruptions, and their plumes and associated atmospheric effects are complex phenomena that may require months to years of data analysis in order to create a comprehensive summary and interpretation of events.

3. Preliminary accounts sometimes contain exaggerations and "false alarms," and accordingly, this report may include some events ultimately found to be erroneous or misleading.

4. Many news agencies do not archive the articles they post on the Internet, and therefore the links to some sources may not be active. To obtain information about the cited articles that are no longer available on the Internet contact the source.

5. USGS Disclaimer Statement for this Website:

Information presented on this website is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credit is requested. We strongly recommend that USGS data be acquired directly from a USGS server and not through other sources that may change the data in some way. While USGS makes every effort to provide accurate and complete information, various data such as names, telephone numbers, etc. may change prior to updating. USGS welcomes suggestions on how to improve our home page and correct errors. USGS provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of furnished data.

Some of the documents on this server may contain live references (or pointers) to information created and maintained by other organizations. Please note that USGS does not control and cannot guarantee the relevance, timeliness, or accuracy of these outside materials.

For site security purposes and to ensure that this service remains available to all users, this government computer system employs software programs to monitor network traffic to identify unauthorized attempts to upload or change information, or otherwise cause damage. Unauthorized attempts to upload information or change information on this website are strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act. Information may also be used for authorized law enforcement investigations. (Last modified September 21, 1999.)

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
URL: https://volcano.si.edu/reports_weekly.cfm

 Acronyms and Abbreviations

a.s.l. - above sea level

AVO - Alaska Volcano Observatory

AVHRR - Advanced Very High Resolution Radiometer

CENAPRED - Centro Nacionale de Prevencion de Desastres (México)

CONRED - Coordinadora Nacional para la Reducción de Desastres

COSPEC - Correlation Spectrometer

CVGHM (formerly VSI) - Center of Volcanology and Geological Hazard Mitigation

CVO - Cascades Volcano Observatory (USGS)

GMS - Geostationary Meteorological Satellite

GOES - Geostationary Operational Environmental Satellite

GVO - Goma Volcano Observatory

GVP - Global Volcanism Program (Smithsonian Institution)

HVO - Hawaiian Volcano Observatory (USGS)

ICE - Instituto Costarricense de Electricidad (Costa Rica)

IG - Instituto Geofísico (Ecuador)

IGNS - Institute of Geological and Nuclear Sciences (New Zealand) - now GNS Science

INETER - Instituto Nicaragüense de Estudios Territoriales (Nicaragua)

INGEMMET - Instituto Geológical Minero y Metalúrgico (Peru)

INGEOMINAS - Instituto Colombiano de Geología y Minería (Colombia)

INGV-CT - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania (Italy)

INSIVUMEH - Instituto Nacional de Sismologia, Vulcanologia, Meteorologia e Hidrologia (Guatemala)

IRD - Institut de Recherche pour le Développement (France)

JMA - Japanese Meteorological Agency

KEMSD - Kamchatkan Experimental and Methodical Seismilogical Department

KVERT - Kamchatkan Volcanic Eruption Response Team

M - magnitude

METEOSAT - Meteorological Satellite

MEVO - Mount Erebus Volcano Observatory

MODIS - Moderate Resolution Imaging Spectroradiometer

MVO - Montserrat Volcano Observatory

MWO - Meteorological Watch Office

NEIC - National Earthquake Information Center

NIED - National Research Institute for Earth Science and Disaster Prevention (Japan)

NOAA - National Oceanic and Atmospheric Administration

NOTAM - Notice to Airmen

OVDAS - Observatorio Volcanologico de los Andes del Sur (Chile)

OFDA - Office of US Foreign Disaster Assistance

ONEMI - Oficina Nacional de Emergencia - Ministerio del Interior (Chile)

OVPDLF - Observatoire Volcanologique du Piton de la Fournaise (France)

OVSICORI-UNA - Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (Costa Rica)

PHIVOLCS - Philippine Institute of Volcanology and Seismology (Philippines)

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geologia y Mineria (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Russia)

USAID - US Agency for International Development

USGS - United States Geological Survey

UTC - Coordinated Universal Time

VAAC - Volcanic Ash Advisory Center

VAFTAD - Volcanic Ash Forecast Transport And Dispersion

VDAP - Volcano Disaster Assistance Program (USGS)

VHP - Volcano Hazards Program (USGS)

VRC - Volcano Research Center (Japan)